单项选择题
A yellow buoy may exhibit a(n)（）.
A.fixed red light
B.flashing light
C.white light
D.occulting light
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相关考题
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单项选择题
A white buoy with an orange rectangle on it displays（）.
A.directions
B.dangers
C.exclusion areas
D.All of the above -
单项选择题
A white buoy with an open-faced orange diamond on it indicates（）.
A.danger
B.vessels are excluded from the area
C.the buoy is a mooring buoy
D.operating restrictions are in effect -
单项选择题
A white buoy with a blue band is（）.
A.an isolated danger mark
B.a hydrographic data collection buoy
C.a mooring buoy
D.marking a restricted area
